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Submissions from 2026

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Butte Priority Soils Operable Unit (BPSOU) 2025 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Atlantic Richfield Company

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Final Repository Siting Study (RSS) Detailed Evaluation and Recommendations Report, Atlantic Richfield Company and Butte Silver Bow

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2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

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Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

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Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

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Butte Priority Soils Operable Unit Diggings East Final 100% Remedial Design Package Submittal, Josh Bryson

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Butte Priority Soils Operable Unit Diggings East Final 100% Remedial Design Package Submittal, Josh Bryson

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Butte Priority Soils Operable Unit Diggings East Final 95% Remedial Design Package Submittal, Josh Bryson

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https://digitalcommons.mtech.edu/superfund_silverbowbutte/1787/, Josh Bryson

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MONTHLY PROGRESS REPORT BUTTE PRIORITY SOILS OPERABLE UNIT CONSENT DECREE PARTIAL REMEDIAL DESIGN/REMEDIAL ACTION AND OPERATION AND MAINTENANCE, Josh Bryson

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MONTHLY PROGRESS REPORT BUTTE PRIORITY SOILS OPERABLE UNIT CONSENT DECREE PARTIAL REMEDIAL DESIGN/REMEDIAL ACTION AND OPERATION AND MAINTENANCE January 2026, Josh Bryson

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RE: 1st Quarter 2026 – Interim Site-Wide Surface Water Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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RE: 2026 Spring Semi-Annual – Interim Site-Wide Groundwater Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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RE: 2nd Quarter 2026 – Interim Site-Wide Surface Water Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

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Response to Agency Comments Re: Comment Letter for the 2022 Butte Priority Soils Operable Unit (BPSOU) Groundwater Compliance Evaluation (dated March 10, 2025), Josh Bryson

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Response to Agency Comments Re: Comment Letter for the 2023 Butte Priority Soils Operable Unit (BPSOU) Groundwater Compliance Evaluation (dated March 10, 2025) Received May 7, 2025, Josh Bryson

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Response to Agency Comments Re: Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) 2020 Groundwater Compliance and Interpretation Technical Memorandum (dated May 12, 2022, Josh Bryson

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Response to Agency Comments Re: Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) Draft Surface Water Compliance and Interpretation Technical Memorandum (dated May 12, 2022), Josh Bryson

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Silver Bow Creek Conservation Area (SBCCA) – Revised 95% Programmatic Technical Specifications Submittal, Josh Bryson

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RE: Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit (BPSOU) Draft 2025 Groundwater Monitoring Data Summary Report Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson and Pioneer Technical Services, Inc.

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2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 Annual Operations and Maintenance Report - 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 Annual Operations and Maintenance Report 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 Annual Operations and Maintenance Report 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

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Butte Reclamation Evaluation System Corrective Action Plans for Reclaimed Sites 2025 BRES Site Specific Corrective Action Plans for Quadrant 2, Butte-Silver Bow Department of Reclamation and Environmental Services

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DRAFT FINAL PHASE I PRE-DESIGN INVESTIGATION EVALUATION REPORT BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

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DRAFT FINAL REMEDIAL DESIGN WORK PLAN BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

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DRAFT INTERMEDIATE (60%) REMEDIAL DESIGN REPORT BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

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DRAFT UNIFORM FEDERAL POLICYQUALITY ASSURANCE PROJECT PLAN ADDENDUM, HydroGeoLogic, Inc.

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Butte Priority Soils Operable Unit (BPSOU) Data Summary Report (DSR) Statement of Authenticity Updates, Mike McAnulty

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Butte Priority Soils Operable Unit (BPSOU) Final Unreclaimed Sites Field Sampling Plan (FSP) Package #7: UR-01, UR-12, UR-03, UR-04, UR-15, and UR-17 Amendment, Mike McAnulty

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Butte Priority Soils Operable Unit Final Butte Hill Revegetation Specifications, Mike McAnulty

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Medical Monitoring Working Group Meeting Minutes, Mike McAnulty

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RE: Butte Priority Soils Operable Unit (BPSOU) Final BPSOU Unreclaimed Sites Anderson Shaft Remedial Action Work Plan (RAWP) Request for Change UR-2026-RA-01, Mike McAnulty

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Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-41 – Montana Street and Interstate-90, Mike McAnulty

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Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-51 –Area near BRES No. 50 – Zelia and Mountain Con Mine, Mike McAnulty

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Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-52 Area West of BRES No. 133 – Dexter Mill, Mike McAnulty

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Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-53 – South of Surprise Dump, Mike McAnulty

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Butte Medical Monitoring Working Group Meeting, Mike McAnulty and Eric Hassler

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Butte Medical Monitoring Working Group Meeting, Mike McAnulty and Eric Hassler

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Medical Monitoring Working Group Meeting Minutes, Mike McAnulty and Eric Hassler

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Draft 2025 Butte Priority Soils Operable Unit Residential Metals Abatement Program Construction Completion Report, Abby Peltomaa

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2026 Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Revised Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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2026 Revised Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

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Butte Priority Soils Operable Unit Final 2022 Unreclaimed Sites Sampling: UR-27 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Butte Priority Soils Operable Unit Final 2024 Unreclaimed Sites Sampling: UR-46 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2022 Unreclaimed Sites Sampling: UR-07 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2022 Unreclaimed Sites Sampling: UR-27 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Insufficiently Reclaimed Sites Sampling: BRES No. 93 – Soudan Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Reclamation Improvement Sites Sampling: BRES No. 17 – Paymaster Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Reclamation Improvement Sites Sampling: BRES No. 31 – Waste Dump #5 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Unreclaimed Sites Sampling: UR-31 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Unreclaimed Sites Sampling: UR-31 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2023 Unreclaimed Sites Sampling: UR-42 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2024 Reclamation Improvement Sampling: BRES No. 78 – Original Mine Yard Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2024 Unreclaimed Sites Sampling: UR-21 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2024 Unreclaimed Sites Sampling: UR-46 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Draft Final 2025 BPSOU Subdrain Data Summary Report (DSR), Pioneer Technical Services, Inc.

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Draft Final Annual Operations and Maintenance (O&M) Report: Butte Treatment Lagoon (BTL) System – 2025, Pioneer Technical Services, Inc.

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Draft Final Annual Operations and Maintenance (O&M) Report: Butte Treatment Lagoon (BTL) System – 2025, Pioneer Technical Services, Inc.

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Draft Final BPSOU Unreclaimed Sites: UR-46 Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

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Draft Final Butte Mine Waste Repository Operation and Maintenance (O&M) Plan, Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit (BPSOU) Insufficiently Reclaimed Sites BRES No. 30 – Atlantic 1 Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit (BPSOU) Insufficiently Reclaimed Sites Sister Dump (BRES No. 38) Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit Insufficiently Reclaimed Sites Temporary Best Management Practices Work Plan: BRES No. 16 – Curry and BRES No. 50 – Zelia, Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites: UR-03 Construction Completion Report, Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites: UR-03 Construction Completion Report, Pioneer Technical Services, Inc.

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Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites: UR-35 Construction Completion Report (CCR), Pioneer Technical Services, Inc.

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Draft Final Quarterly Operations and Maintenance Report: Butte Treatment Lagoon System – First Quarter 2026, Pioneer Technical Services, Inc.

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Draft Final Quarterly Operations and Maintenance Report: Butte Treatment Lagoon System – Fourth Quarter 2025, Pioneer Technical Services, Inc.

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Draft Final Silver Bow Creek Conservation Area Materials Management Plan Revision 1, Pioneer Technical Services, Inc.

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Draft Final Silver Bow Creek Conservation Area (SBCCA) Butte Reduction Works (BRW) Air Monitoring for Interim Demolition Activities – Phase II Data Summary Report (DSR), Pioneer Technical Services, Inc.

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Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 16 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 30 – Atlantic-1 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 32 – Corra 2 Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

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Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 37 – Josephine Shaft Site Evaluation Summary Report, Pioneer Technical Services, Inc.